Exam 12: Basic Electricity and Magnetism
Exam 1: Heat and Pressure45 Questions
Exam 2: Matter and Energy32 Questions
Exam 3: Refrigeration and Refrigerants38 Questions
Exam 4: General Safety Practices31 Questions
Exam 5: Tools and Equipment30 Questions
Exam 6: Fasteners32 Questions
Exam 7: Tubing and Piping45 Questions
Exam 8: Leak Detection, System Evacuation and System Clean-Up33 Questions
Exam 9: Refrigerant and Oil Chemistry and Managementrecovery, Recycling, Reclaiming, and Retrofitting39 Questions
Exam 10: System Charging27 Questions
Exam 11: Calibrating Instruments34 Questions
Exam 12: Basic Electricity and Magnetism46 Questions
Exam 13: Introduction to Automatic Controls30 Questions
Exam 14: Automatic Control Components and Applications34 Questions
Exam 15: Troubleshooting Basic Controls33 Questions
Exam 16: Advanced Automatic Controlsdirect Digital Controls Ddc and Pneumatics35 Questions
Exam 17: Types of Electric Motors36 Questions
Exam 18: Application of Motors33 Questions
Exam 19: Motor Controls31 Questions
Exam 20: Troubleshooting Electric Motors30 Questions
Exam 21: Evaporators and the Refrigeration System37 Questions
Exam 22: Condensers35 Questions
Exam 23: Compressors35 Questions
Exam 24: Expansion Devices29 Questions
Exam 25: Special Refrigeration System Components35 Questions
Exam 26: Application of Refrigeration Systems34 Questions
Exam 27: Commercial Ice Machines35 Questions
Exam 28: Special Refrigeration Applications27 Questions
Exam 29: Troubleshooting and Typical Operating Conditions for Commercial Refrigeration34 Questions
Exam 30: Electric Heat29 Questions
Exam 31: Gas Heat27 Questions
Exam 32: Oil Heat35 Questions
Exam 33: Hydronic Heat35 Questions
Exam 34: Indoor Air Quality35 Questions
Exam 35: Comfort and Psychrometrics35 Questions
Exam 36: Refrigeration Applied to Air Conditioning31 Questions
Exam 37: Air Distribution and Balance35 Questions
Exam 38: Installation32 Questions
Exam 39: Residential Energy Auditing35 Questions
Exam 40: Typical Operating Conditions25 Questions
Exam 41: Troubleshooting28 Questions
Exam 42: Heat Gain and Heat Loss in Buildings35 Questions
Exam 43: Air Source Heat Pumps35 Questions
Exam 44: Geothermal Heat Pumps31 Questions
Exam 45: Domestic Refrigerators and Freezers35 Questions
Exam 46: Room Air Conditioners34 Questions
Exam 47: High-Pressure, Low-Pressure, and Absorption Chilled-Water Systems35 Questions
Exam 48: Cooling Towers and Pumps30 Questions
Exam 49: Operation, Maintenance, and Troubleshooting of Chilled-Water Air Conditioning Systems28 Questions
Exam 50: Commercial Rooftop, Packaged, Variable Refrigerant Flow, and Variable Air Volume Systems35 Questions
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If two light bulbs are wired in series and one bulb burns out, the other bulb will ____.
(Multiple Choice)
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The unit of measurement for the charge a capacitor can store is called a Joule.
(True/False)
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When calculating the total resistance of a parallel circuit, the result will always be lower than the lowest resistance.
(True/False)
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A transformer has 10,000 turns of wire in the secondary and 100 turns in the primary. The transformer is connected to a line voltage of 120 V. The output voltage will be ____________________ volts.
(Short Answer)
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If two electrical loads are connected in parallel with each other and each load draws 6 A, what is the total current of the circuit ?
(Short Answer)
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If a conductor carrying electrical current is formed into a coil, the strength of the magnetic field generated by the wire will increase.
(True/False)
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A heat sink is a device to improve the purity of the electrons in an electrical circuit.
(True/False)
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A PTC thermistor causes the resistance of the thermistor to increase when its temperature rises.
(True/False)
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The unit of measure for resistance is the ____________________.
(Short Answer)
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A solid state device that allows electrical energy to flow through in only one direction is called a(n) ____________________.
(Short Answer)
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If five electrons combine with three protons, the net charge will be ____.
(Multiple Choice)
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As the diameter of a wire increases, its resistance will also increase.
(True/False)
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